ucb.io
Class InputItem

java.lang.Object
  |
  +--ucb.io.InputItem

public class InputItem

extends java.lang.Object

Represents a data item having one of several different types. The type() function returns a tag indicating the kind of data currently contained. The toXXX() functions return the represented value as an object of type XXX, if sensible. The set(...) functions change the the value represented (and its type).

Each InputItem bears an integer tag, retrievable by the type() function, that indicates the type of value it currently contains:

UNDEFINED

Invalid value (never set).

INT

An integer (toInt() and toLong() are valid).

LONG

A long integer (toLong() is valid).

FLOAT

A float value (toFloat() and toDouble() are valid).

DOUBLE

A double value (toDouble() is valid).

STRING

A String value (toString() is valid).

CHAR

A char or String value (toString() is valid; toChar(), toInt(), or toLong() retrieve the first character).

See Also:

FormatReader

Field Summary

static int	CHAR
static int	DOUBLE
static int	FLOAT
static int	INT
static int	LONG
static int	STRING
static int	UNDEFINED

Constructor Summary

InputItem()
A new InputItem with an undefined value (type UNDEFINED).

Method Summary

void	set(char c) Set the value of this to given value, and set type() to CHAR.
void	set(double d) Set the value of this to given value, and set type() to DOUBLE.
void	set(float f) Set the value of this to given value, and set type() to FLOAT.
void	set(int x) Set the value of this to given value, and set type() to INT.
void	set(long x) Set the value of this to given value, and set type() to LONG.
void	set(java.lang.String s, int type) Set the value of this to given value, and set type() to given type, either CHAR or STRING.
char	toChar() The value of this InputItem, if it is of type CHAR.
double	toDouble() The value of this InputItem, if it is of type DOUBLE or FLOAT.
float	toFloat() The value of this InputItem, if it is of type FLOAT.
int	toInt() The value of this InputItem, if it is of type INT or CHAR.
long	toLong() The value of this InputItem, if it is of type LONG, INT, or CHAR.
java.lang.String	toString() The value of this InputItem, if it is of type CHAR or STRING.
int	type() The integer tag (UNDEFINED, INT, LONG, FLOAT, DOUBLE, STRING) representing the current value's type.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

UNDEFINED

public static final int UNDEFINED

INT

public static final int INT

LONG

public static final int LONG

FLOAT

public static final int FLOAT

DOUBLE

public static final int DOUBLE

STRING

public static final int STRING

CHAR

public static final int CHAR

Constructor Detail

InputItem

public InputItem()

A new InputItem with an undefined value (type UNDEFINED).

Method Detail

type

public int type()

The integer tag (UNDEFINED, INT, LONG, FLOAT, DOUBLE, STRING) representing the current value's type.

toDouble

public double toDouble()
                throws java.lang.IllegalArgumentException

The value of this InputItem, if it is of type DOUBLE or FLOAT.

toFloat

public float toFloat()
              throws java.lang.IllegalArgumentException

The value of this InputItem, if it is of type FLOAT.

toInt

public int toInt()
          throws java.lang.IllegalArgumentException

The value of this InputItem, if it is of type INT or CHAR.

toLong

public long toLong()
            throws java.lang.IllegalArgumentException

The value of this InputItem, if it is of type LONG, INT, or CHAR.

toChar

public char toChar()
            throws java.lang.IllegalArgumentException

The value of this InputItem, if it is of type CHAR.

toString

public java.lang.String toString()

The value of this InputItem, if it is of type CHAR or STRING.

Overrides:

toString in class java.lang.Object

set

public void set(double d)

Set the value of this to given value, and set type() to DOUBLE.

set

public void set(float f)

Set the value of this to given value, and set type() to FLOAT.

set

public void set(int x)

Set the value of this to given value, and set type() to INT.

set

public void set(long x)

Set the value of this to given value, and set type() to LONG.

set

public void set(char c)

Set the value of this to given value, and set type() to CHAR.

set

public void set(java.lang.String s,
                int type)

Set the value of this to given value, and set type() to given type, either CHAR or STRING.